D Q R Report

DQRID : D150817.2

Start Date	Start Time	End Date	End Time	Data Quality Metric
06/26/2011	0000	Open Ended	0000	Suspect

Subject:	NSA/XSAPR/C1 - General Quality Statement
DataStreams:	nsaxsaprsurC1.00, nsaxsaprvptC1.a1, nsaxsaprppiC1.a1, nsaxsaprrhiC1.a1, nsaxsaprvptC1.00, nsaxsaprppiC1.00, nsaxsaprhsrhiC1.00
Description:	The XSAPR continues to undergo evaluation by the radar instrument mentors, VAP developers, DQ Office, users, etc... As more in-depth analysis and calibration studies take place, we anticipate that new insights will be gained to increase the quality of the data and decrease the uncertainty of the measurements. This is a continuous improvement process and issues will be addressed as they are discovered. As issues are discovered, attempts will be made to correct data that are currently in the Archive. However, retrospective correction of errors due to calibration, signal processing, component degradation and software bugs may not be possible for many of the data files. This open-ended DQR is an advisory that some aspects of the data quality are not yet known. It is also a request to users that find issues or questions with the data to contact the ARM Radar Engineering & Operations Group as these issues occur so that they can be investigated and corrected if necessary. Known Issues Not Documented in Other DQRs 1. Due to the radome design, a radial pattern shows up in the data during times of stratiform precipitation and longer term statistical analysis
Suggestions:
Measurements:	nsaxsaprppiC1.00: dp_phase_shift diff_phase sig_qual_index reflectivity_corr mean_doppler_velocity diff_reflectivity reflectivity_unf gate time copol_coeff doppler_spectral_width reflectivity diff_reflectivity_corr more nsaxsaprvptC1.a1: prt time_coverage_end longitude sweep_start_ray_index volume_number time prt_mode total_power range elevation azimuth sweep_number unambiguous_range differential_reflectivity doppler_spectrum_width time_coverage_start reflectivity_horizontal differential_phase mean_doppler_velocity altitude cross_correlation_ratio specific_differential_phase normalized_coherent_power file_status sweep_mode latitude sweep_end_ray_index fixed_angle nyquist_velocity more nsaxsaprvptC1.00: reflectivity mean_doppler_velocity time dp_phase_shift gate copol_coeff sig_qual_index reflectivity_unf diff_phase reflectivity_corr diff_reflectivity_corr diff_reflectivity doppler_spectral_width more nsaxsaprppiC1.a1: fixed_angle time_coverage_end reflectivity_horizontal differential_phase prt file_status sweep_number differential_reflectivity latitude azimuth doppler_spectrum_width prt_mode time_coverage_start volume_number longitude elevation specific_differential_phase sweep_end_ray_index sweep_mode unambiguous_range sweep_start_ray_index normalized_coherent_power total_power altitude mean_doppler_velocity cross_correlation_ratio time nyquist_velocity range more nsaxsaprrhiC1.a1: sweep_end_ray_index total_power prt_mode elevation time_coverage_end nyquist_velocity file_status time_coverage_start unambiguous_range time volume_number sweep_mode reflectivity_horizontal doppler_spectrum_width normalized_coherent_power sweep_number differential_phase latitude altitude azimuth differential_reflectivity specific_differential_phase prt range mean_doppler_velocity longitude cross_correlation_ratio sweep_start_ray_index fixed_angle more nsaxsaprhsrhiC1.00: sig_qual_index diff_reflectivity reflectivity_unf copol_coeff dp_phase_shift diff_reflectivity_corr reflectivity doppler_spectral_width diff_phase time gate mean_doppler_velocity reflectivity_corr more nsaxsaprsurC1.00: diff_reflectivity_corr reflectivity_corr doppler_spectral_width diff_reflectivity diff_phase reflectivity_unf dp_phase_shift time gate reflectivity sig_qual_index mean_doppler_velocity copol_coeff more

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